pbuilder does not detect archive location

[Heinrich Schuchardt]

On a RISC-V system I was installing ubuntu-dev-tools which as dependency pulls in pbuilder.

pbuilder does not automatically detect the location of the archive (http://ports.ubuntu.com/ubuntu-ports). Instead a message is shown:

Please enter the default mirror you want to be used by pbuilder.
If you leave this field blank, there will be one attempt to autodetect this information. If this attempt
fails, you will be prompted again to insert some valid mirror
information.Here is a valid mirror example: http://archive.ubuntu.com/ubuntu
Default mirror site:

The reason seems to be that we have moved that information form /etc/apt/sources.list to /etc/apt/sources.list.d/ubuntu-sources without updating the pbuilder source accordingly.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: pbuilder 0.231build1
Uname: Linux 6.6.12-g950a4c580c1e riscv64
ApportVersion: 2.28.1-0ubuntu3
Architecture: riscv64
CasperMD5CheckResult: unknown
CloudArchitecture: riscv64
CloudBuildName: server
CloudID: nocloud
CloudName: unknown
CloudPlatform: nocloud
CloudSerial: 20240423
CloudSubPlatform: seed-dir (/var/lib/cloud/seed/nocloud-net)
Date: Mon Jul 29 12:01:18 2024
PackageArchitecture: all
SourcePackage: pbuilder
UpgradeStatus: No upgrade log present (probably fresh install)